scholarly journals Random subgraphs of finite graphs: I. The scaling window under the triangle condition

2005 ◽  
Vol 27 (2) ◽  
pp. 137-184 ◽  
Author(s):  
Christian Borgs ◽  
Jennifer T. Chayes ◽  
Remco van der Hofstad ◽  
Gordon Slade ◽  
Joel Spencer
2005 ◽  
Vol 33 (5) ◽  
pp. 1886-1944 ◽  
Author(s):  
Christian Borgs ◽  
Jennifer T. Chayes ◽  
Remco van der Hofstad ◽  
Gordon Slade ◽  
Joel Spencer

COMBINATORICA ◽  
2006 ◽  
Vol 26 (4) ◽  
pp. 395-410 ◽  
Author(s):  
Christian Borgs ◽  
Jennifer T. Chayes ◽  
Remco van der Hofstad ◽  
Gordon Slade ◽  
Joel Spencer

Author(s):  
J.M BUDD ◽  
Y. VAN GENNIP

An emerging technique in image segmentation, semi-supervised learning and general classification problems concerns the use of phase-separating flows defined on finite graphs. This technique was pioneered in Bertozzi and Flenner (2012, Multiscale Modeling and Simulation10(3), 1090–1118), which used the Allen–Cahn flow on a graph, and was then extended in Merkurjev et al. (2013, SIAM J. Imaging Sci.6(4), 1903–1930) using instead the Merriman–Bence–Osher (MBO) scheme on a graph. In previous work by the authors, Budd and Van Gennip (2020, SIAM J. Math. Anal.52(5), 4101–4139), we gave a theoretical justification for this use of the MBO scheme in place of Allen–Cahn flow, showing that the MBO scheme is a special case of a ‘semi-discrete’ numerical scheme for Allen–Cahn flow. In this paper, we extend this earlier work, showing that this link via the semi-discrete scheme is robust to passing to the mass-conserving case. Inspired by Rubinstein and Sternberg (1992, IMA J. Appl. Math.48, 249–264), we define a mass-conserving Allen–Cahn equation on a graph. Then, with the help of the tools of convex optimisation, we show that our earlier machinery can be applied to derive the mass-conserving MBO scheme on a graph as a special case of a semi-discrete scheme for mass-conserving Allen–Cahn. We give a theoretical analysis of this flow and scheme, proving various desired properties like existence and uniqueness of the flow and convergence of the scheme, and also show that the semi-discrete scheme yields a choice function for solutions to the mass-conserving MBO scheme.


2021 ◽  
Vol 103 (1) ◽  
Author(s):  
D. L. Boyda ◽  
M. N. Chernodub ◽  
N. V. Gerasimeniuk ◽  
V. A. Goy ◽  
S. D. Liubimov ◽  
...  

2016 ◽  
Vol 32 (6) ◽  
pp. 2575-2589
Author(s):  
Seongmin Ok ◽  
R. Bruce Richter ◽  
Carsten Thomassen

COMBINATORICA ◽  
1982 ◽  
Vol 2 (3) ◽  
pp. 229-235 ◽  
Author(s):  
François Bry ◽  
Michel Las Vergnas

2012 ◽  
Vol 21 (4) ◽  
pp. 635-641
Author(s):  
ÁDÁM TIMÁR

We construct a sequence of finite graphs that weakly converge to a Cayley graph, but there is no labelling of the edges that would converge to the corresponding Cayley diagram. A similar construction is used to give graph sequences that converge to the same limit, and such that a Hamiltonian cycle in one of them has a limit that is not approximable by any subgraph of the other. We give an example where this holds, but convergence is meant in a stronger sense. This is related to whether having a Hamiltonian cycle is a testable graph property.


2014 ◽  
Vol 46 (2) ◽  
pp. 329-341 ◽  
Author(s):  
Pierre-Nicolas Jolissaint ◽  
Alain Valette
Keyword(s):  

2000 ◽  
Vol 21 (8) ◽  
pp. 1057-1066 ◽  
Author(s):  
C.M. Reidys

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